.content {
  padding: 0;
  margin: 0 15px 15px;
}
.content .content-wrap {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
}
.content .content-wrap .picItem {
  width: 100%;
  overflow: hidden;
  height: 400px;
  position: relative;
  text-align: center;
}
.content .content-wrap .picItem a img {
  overflow: hidden;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  height: 400px;
}
.content .content-wrap .picItem a:hover .shadow {
  opacity: 0.5;
}
.content .content-wrap .picItem a .shadow {
  transition: all 1s;
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.content .content-wrap .picItem a .shade {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 112px;
  background-color: #000;
  opacity: 0.4;
}
.content .content-wrap .picItem a .info {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 52px;
  padding: 30px 20px;
  color: #fff;
  font-size: 14px;
  width: 50%;
  text-align: left;
}
.content .content-wrap .picItem a .info .top span {
  display: inline-block;
  padding: 0 5px 5px 0;
}
.content .content-wrap .picItem a .arrow {
  z-index: 19;
  position: absolute;
  right: 30px;
  bottom: 56px;
  transform: translateY(50%);
  height: 34px;
  width: 17px;
  background: url('../assets/arrow.png') no-repeat 0 0;
}
@media screen and (min-width: 730px) {
  .content {
    margin: 0 40px 40px;
  }
  .content-wrap .picItem:nth-child(odd) {
    width: 60%;
    height: 400px;
  }
  .content-wrap .picItem:nth-child(even) {
    width: 40%;
    height: 400px;
  }
  /* header和导航栏显示,logo变大 */
  div.home .sm-topbar {
    display: none;
  }
  div.home .header {
    display: block;
  }
  div.home nav.navbar {
    display: block;
  }
}
@media screen and (min-width: 991px) {
  .content .content-wrap .picItem {
    width: 50%;
  }
  /*   导航栏字变大 */
  .home .navbar .menu li a {
    font-size: 20px;
  }
  .home footer div.top div.left-content {
    overflow: unset;
  }
}
@media screen and (min-width: 1280px) {
  .content .content-wrap .picItem {
    width: 20%;
  }
  .content .content-wrap .picItem:nth-child(4n + 0) {
    width: 40%;
  }
  .content .content-wrap .picItem:nth-child(1),
  .content .content-wrap .picItem:nth-child(2) {
    width: 40%;
  }
  .home footer div.top div.left-content .left,
  .home footer div.top div.left-content .right {
    padding: 0 40px 40px 0;
    font-size: 18px;
  }
  .home footer div.top div.left-content .left {
    font-size: 25px;
  }
  .home footer div.top div.right-content {
    float: right;
    font-size: 18px;
  }
  .home footer div.top div.right-content .left,
  .home footer div.top div.right-content .right {
    padding: 0 40px 40px 0;
  }
}
@media screen and (min-width: 1440px) {
  .home .content .content-wrap .picItem {
    width: 33.333333%;
  }
}
